20515948 has 6 divisors (see below), whose sum is σ = 35902916. Its totient is φ = 10257972.

The previous prime is 20515933. The next prime is 20515967. The reversal of 20515948 is 84951502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564490 + ... + 2564497.

Almost surely, 2^20515948 is an apocalyptic number.

It is an amenable number.

20515948 is a deficient number, since it is larger than the sum of its proper divisors (15386968).

20515948 is a wasteful number, since it uses less digits than its factorization.

20515948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128991 (or 5128989 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 20515948 is about 4529.4533886552. The cubic root of 20515948 is about 273.7561365846.

The spelling of 20515948 in words is "twenty million, five hundred fifteen thousand, nine hundred forty-eight".